Bug 1740594 - replace references to IRC (#7316)

docs/infrastructure/troubleshooting.md

@@ -67,7 +67,7 @@ If new pushes or CI job results are not appearing in Treeherder's UI:
    cause is infrastructure-related.
 3. Failing that, it's possible the issue might lie in the services that send events to
    those Pulse exchanges, such as `taskcluster-github` or
-   the Taskcluster systems upstream of those. Ask for help in the IRC channel
-   `#taskcluster`.
+   the Taskcluster systems upstream of those. Ask for help in the Slack channel
+   `#taskcluster-cloudops`.
 
 [using pulse guardian]: https://pulseguardian.mozilla.org/queues

ui/contribute.json

@@ -9,8 +9,9 @@
   "participate": {
     "home": "https://wiki.mozilla.org/EngineeringProductivity/Projects/Treeherder",
     "docs": "https://treeherder.readthedocs.io/",
-    "irc": "irc://irc.mozilla.org/#treeherder",
-    "mailing-list": "https://groups.google.com/forum/#!forum/mozilla.tools.treeherder"
+    "chat": {
+      "url": "https://chat.mozilla.org/#/room/#treeherder:mozilla.org"
+    }
   },
   "bugs": {
     "list": "https://bugzilla.mozilla.org/buglist.cgi?quicksearch=%3Atreeherder",
@@ -18,7 +19,8 @@
   },
   "urls": {
     "prod": "https://treeherder.mozilla.org/",
-    "stage": "https://treeherder.allizom.org/"
+    "stage": "https://treeherder.allizom.org/",
+    "prototype": "https://prototype.treeherder.nonprod.cloudops.mozgcp.net/"
   },
   "keywords": ["css", "django", "react", "js", "python"]
 }

ui/userguide/UserGuideHeader.jsx

@@ -21,8 +21,10 @@ const UserGuideHeader = function UserGuideHeader() {
         {' '}
         Project Wiki{' '}
       </a>
-      or ask us on IRC in
-      <a href="irc://irc.mozilla.org/treeherder"> #treeherder</a>
+      or ask us on Element in{' '}
+      <a href="https://chat.mozilla.org/#/room/#treeherder:mozilla.org">
+        #treeherder
+      </a>
     </div>
   );
 };